IT was not till five months after the death of the unhappy Emperor Rudolf II that, on June 13, 1612, his brother Matthias reached the height of his ambition by being elected to the Imperial throne. His candidature had been approved by all the other Archdukes; but the Spiritual Electors had caused delay by reverting to the idea of securing the succession to the more capable Archduke Albert, notwithstanding his renunciation of his rights and the Spanish Government's dislike of the project. The Temporal Electors, after discarding in turn the equally short-sighted notions of putting forward Maximilian of Bavaria and his namesake, the Austrian Archduke, settled down to a choice which, from the point of view of militant Protestantism, might suit a brief period of transition. Their action had been quickened by Klesl's management, and by the diplomatic exertions of Christian of Anhalt, seconded by those of the Margraves Joachim Ernest of Ansbach and George Frederick of Baden-Durlach…